MESOSCALE DISCUSSION 1204
NWS STORM PREDICTION CENTER NORMAN OK
0943 PM CDT SUN JUN 29 2014
AREAS AFFECTED...ECNTRL THROUGH NERN IA INTO SWRN WI AND NWRN IL
CONCERNING...SEVERE THUNDERSTORM WATCH 369...
VALID 300243Z - 300415Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 369
CONTINUES.
SUMMARY...THREAT FOR MAINLY ISOLATED DAMAGING WIND AND LARGE HAIL
PERSISTS FROM ERN IA INTO SWRN WI AND NWRN IL. A SHORT-TERM THREAT
FOR A TORNADO ALSO EXISTS OVER A PORTION OF ECNTRL IA.
DISCUSSION...NUMEROUS STORMS PERSIST FROM ECNTRL IA INTO SWRN WI
WITHIN A MODERATELY UNSTABLE ENVIRONMENT. STORMS APPEAR TO BE
DEVELOPING WHERE A MODEST INCREASE IN THE SSWLY LLJ HAS AUGMENTED
ASCENT IN VICINITY OF AN E-W ORIENTED BOUNDARY. BOTH THE DES MOINES
AND DAVENPORT VWP DATA HAVE SHOWN SOME INCREASE IN 0-1 KM HODOGRAPH
SIZE...AND 0-6 KM SHEAR IS ON THE ORDER OF 50 KT. THIS ENVIRONMENT
WILL REMAIN FAVORABLE FOR ORGANIZED STORMS INCLUDING A FEW
SUPERCELLS. THE STRONGEST STORMS WITH SUPERCELL STRUCTURES ARE
MOVING INTO BENTON COUNTY OVER ECNTRL IA. THESE STORMS MAY PRODUCE
LARGE HAIL AND DAMAGING WIND...BUT A TORNADO ALSO REMAINS POSSIBLE
IN THE NEAR TERM. GIVEN THE NUMBER OF STORMS DEVELOPING...THERE
SHOULD BE A TENDENCY FOR UPSCALE GROWTH INTO CLUSTERS/LINES DURING
THE NEXT COUPLE HOURS.
..DIAL.. 06/30/2014
ATTN...WFO...LOT...MKX...DVN...ARX...
LAT...LON 41379193 42689200 43409144 43758940 42038967 41379193